CN113429885A - Old asphalt pavement coating material and preparation method thereof - Google Patents
Old asphalt pavement coating material and preparation method thereof Download PDFInfo
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- CN113429885A CN113429885A CN202110595658.1A CN202110595658A CN113429885A CN 113429885 A CN113429885 A CN 113429885A CN 202110595658 A CN202110595658 A CN 202110595658A CN 113429885 A CN113429885 A CN 113429885A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09F—NATURAL RESINS; FRENCH POLISH; DRYING-OILS; DRIERS (SICCATIVES); TURPENTINE
- C09F9/00—Compounds to be used as driers (siccatives)
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Abstract
The invention discloses an old asphalt pavement coating material and a preparation method thereof, belonging to the field of road engineering. The coating material is prepared from a main solvent I, an asphalt cement, a functional filler, a modified master batch, a stabilizer and a drier in a specific ratio, wherein the modified master batch contains a regenerant and an antioxidant, and the Brookfield viscosity of the coating material at 20 ℃ is 2000-4000 cPs. Compared with the prior art, the coating material can greatly improve the regeneration, water sealing and loose resistance of the old asphalt pavement, has simple and convenient implementation process and stable performance, and has good popularization and application values.
Description
Technical Field
The invention relates to the field of road engineering, and particularly provides an old asphalt pavement coating material and a preparation method thereof.
Background
The surface sealing of the asphalt pavement is one of the most commonly used preventive maintenance methods in the prior art, and is also one of the old asphalt pavement repairing methods. At present, the method mainly comprises a fog seal, a stone chip seal, a slurry seal and a micro-surfacing.
The fog seal is formed by spraying a fog of emulsified asphalt or rejuvenating agent onto the aged asphalt pavement to rejuvenate and reduce the oxidized asphalt of the pavement. The spraying equipment is adopted for spraying, the construction method is simple, but the anti-friction capability of the pavement can be reduced, the original asphalt pavement is only compensated by the loss of an asphalt film, the abrasion resistance is poor, the anti-permeability retention capability is weak, and the service life is only 1-2 years generally.
Chipsealing is the spraying of a layer of bituminous material (hot bitumen, light bitumen, emulsified bitumen, etc.) on the road surface followed by the spreading of a suitable amount of aggregate and followed by rolling. The initial curing time is long, the bonding property with the old pavement is poor, and the aggregate is easy to dissipate under the condition of rolling the wheels.
The slurry seal is a slurry mixture composed of emulsified asphalt, crushed aggregate, mineral powder, water and additive. The micro-surfacing is an ultra-thin layer mixture composed of modified emulsified asphalt, aggregates with certain gradation, mineral powder, water and additives.
The slurry seal layer and the micro-surfacing are evenly stirred and then paved on the original asphalt pavement, and the slurry seal layer and the micro-surfacing have certain anti-wear effect, but have the problems of large driving noise, poor durability, poor adhesion with the old pavement, unstable emulsion breaking time, large maintenance difficulty after local damage and the like.
Materials such as fog sealing, slurry sealing, micro-surfacing and the like adopted in the current market mostly adopt emulsified asphalt or modified emulsified asphalt materials, and the materials have the following defects:
1. the material composition is simple, the compensation of the ground asphalt membrane can be realized only by adopting the water-based emulsification process to the asphalt binder, the thickness is thin, the stiffness and the stability of the asphalt mastic cannot be achieved, the wear resistance is poor, and the long-acting durable seepage prevention cannot be realized after the application; 2. the demulsification speed is too fast, the performance is unstable, the storage time is short, and the requirements on operating environments such as temperature, wind speed and the like are high. 3. The adhesion force between the asphalt pavement and the old asphalt pavement is insufficient, and the stability is poor. 4. Most of the reducing and regenerating fog sealing layer materials in the market adopt aromatic organic solvents, so that the environmental protection property is poor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the old asphalt pavement coating material which can greatly improve the regeneration, water sealing and loose resistance of the pavement, has simple and convenient implementation process and stable performance.
The technical task of the invention is realized by the following modes: an old asphalt pavement coating material is mainly prepared from the following raw materials in parts by weight:
the first main solvent is an organic solvent;
the asphalt cement is low-grade and high-softening-point asphalt;
the modified master batch is prepared from a second main solvent, a modifier, a regenerant, an anti-permeability agent, a coupling agent and an antioxidant;
the coating material has a Brookfield viscosity of 2000-4000cPs at 20 ℃.
Preferably, the coating material is prepared from the following raw materials in parts by weight:
preferably, the weight ratio of the second main solvent to the modifier to the regenerant to the anti-permeability agent to the coupling agent to the antioxidant in the modified master batch is (40-55) to (10-17) to (5.2-6.6) to (15-19) to (4-11) to (0.05-0.15), particularly preferably (45-55) to (15-17) to (6.0-6.5) to (18-19) to (7-11) to (0.1-0.12),
the second main solvent is one or a mixture of more of 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil and gasoline;
the modifier is one or a mixture of more of styrene-butadiene copolymer, styrene-butadiene-styrene triblock copolymer and neoprene latex;
the regenerant is a mixture of aromatic hydrocarbon oil and phthalate (peptide acid ester), and the mass ratio of the aromatic hydrocarbon oil to the phthalate (peptide acid ester) is 100 (8-12);
the anti-permeability agent is an unsaturated fatty acid substance, has a melting point of less than or equal to 20 ℃ and a number average molecular weight of less than or equal to 400, and is a mixture of one or more of oleic acid, palmitoleic acid and soybean oleic acid;
the coupling agent is vinyl silane coupling agent;
the antioxidant is fly ash and/or phyllosilicate.
Further, the preparation method of the modified master batch is preferably as follows: and under the protection of nitrogen in a closed container, stirring the main solvent II and the anti-permeability agent at the temperature of 30-60 ℃ until the main solvent II and the anti-permeability agent are completely dissolved, then sequentially adding the regenerant, the coupling agent, the modifier and the antioxidant, continuously stirring for a certain time, naturally cooling to room temperature, and then carrying out ultrasonic treatment for a certain time to obtain the activated modified master batch.
Preferably, the treatment time of the ultrasonic treatment is 10 to 30min, particularly preferably 15 to 25 min; the vibration frequency is 30-40KHz, and 23-27KHz is particularly preferable.
Preferably, the first main solvent is a mixture of one or more of 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil and gasoline.
In order to ensure the stability of the coating material under high temperature conditions, the asphalt cement preferably has a penetration degree of less than or equal to 50(0.1mm) at 25 ℃ and a softening point of more than or equal to 65 ℃, and is particularly preferably a mixture of one or more of rock asphalt, Trinidad lake asphalt, 50# asphalt, 40# asphalt, 30# asphalt, 20# asphalt and 10# asphalt.
Preferably, the functional filler is ground powder of basic rock or super basic rock, the fineness is not less than 200 meshes, and particularly preferably one or more of ground marble, limestone, basalt, granite, dolomite, talcum powder, carborundum or steel slag powder.
Preferably, the stabilizer is lignocellulose with a fiber length of 100-500 microns (preferably 200-300 microns).
Preferably, the drier is one or a mixture of two of naphthenic acid soap and sulfite (such as sodium sulfite, magnesium sulfite and the like).
In order to improve other construction characteristics of the coating material, a flavoring agent can be added into the coating material, and ethyl acetate is preferred; the colorant is preferably an organic colorant of acrylic resin type or epoxy resin type, or an inorganic colorant of carbon black, iron oxide, manganese dioxide, chromium oxide, phthalocyanine blue, ultramarine blue, or the like.
The invention further aims to provide a preparation method of the old asphalt pavement coating material.
The preparation method of the old asphalt pavement coating material is characterized by being carried out in a closed container under the protection of nitrogen, and comprises the following steps:
s1, stirring a main solvent II and an anti-permeability agent at 30-60 ℃ until the main solvent II and the anti-permeability agent are completely dissolved, then sequentially adding a regenerant, a coupling agent, a modifier and an antioxidant, continuously stirring for a certain time, naturally cooling to room temperature, and then carrying out ultrasonic treatment for a certain time to obtain an activated modified master batch;
s2, heating the asphalt cement to the temperature of 120-150 ℃, and then cooling to a state of maintaining a flowing and transportable state to obtain a component A;
s3, mixing the primary solvent I and the modified master batch at the temperature of 30-60 ℃, and uniformly stirring to obtain a component B;
s4, slowly adding the component A into the component B, mixing, then sequentially adding the stabilizer, the drier and the functional filler, uniformly stirring to obtain the long-acting hydrophobic water coating material,
the weight ratio of each raw material is as follows:
the first main solvent is an organic solvent;
the asphalt cement is low-grade and high-softening-point asphalt;
the modified master batch is prepared from a second main solvent, a modifier, a regenerant, an anti-permeability agent, a coupling agent and an antioxidant;
the coating material has a Brookfield viscosity of 2000-4000cPs at 20 ℃.
The pavement repairing coating material can be sprayed and constructed by high-pressure asphalt coating spraying equipment, can be directly sprayed on an underlying pavement structure layer, and can also be subjected to pretreatment such as shot blasting and the like before spraying.
The spraying amount is preferably uniform and non-leakage, and preferably 0.6-1.3Kg/m2It is preferable.
The optimum spraying amount for different pavement types and diseases is shown in table 1.
TABLE 1 optimal spray amount for different pavement types and conditions of damage
| Road surface type | Description of major diseases | Spreading amount range (Kg/m)2) |
| AC asphalt concrete pavement | Burnishing, loosening, loss of asphaltic membrane | 0.6～0.85 |
| SMA asphalt concrete pavement | Loose, missing bituminous membrane | 0.9～1.3 |
| Asphalt macadam pavement | Loosening | 1.0～1.3 |
| AK asphalt concrete pavement | Loose, missing bituminous membrane | 1.0～1.3 |
In the implementation process, the anti-skid capacity and the texture of the asphalt pavement can be divided into three states of rough, moderate and smooth, and generally, the low limit of the recommended spreading amount is preferably adopted in the state of partial smoothness.
The spraying pressure of the pump of the high-pressure spraying vehicle is preferably 18-22Kg, the flow control of the mixture is preferably 320-350Kg/min, the driving speed is preferably controlled at 7-9Km/h, the speed and the spraying amount of the spraying equipment are kept stable during spraying, and the spraying is uniform within the whole spraying width range. The height above the ground of the spray pipe of the spray vehicle is preferably 350-450mm and can be fixed, the distance between the adjacent oil nozzles is preferably 200-400mm, the spray widths of the oil nozzles are overlapped, the material sprayed by two or three oil nozzles is received at the same place, and the occurrence of white stripes is avoided.
Compared with the prior art, the old asphalt pavement coating material and the preparation method thereof have the following outstanding beneficial effects:
the adopted asphalt cementing material has the characteristics of low grade, high softening point and the like, has good compatibility with a main solvent, has good workability during construction, can shorten drying time after construction, and can ensure good high-temperature stability during use;
the environment-friendly organic solvent is adopted, so that the paint has higher solubility and post-construction volatility, the hydrophobicity and the water stability are improved compared with the traditional emulsified 'water-based' asphalt-based paint on the market, and the environmental protection property is improved compared with the traditional aromatic hydrocarbon organic solvent;
thirdly, the activation modified master batch obtained by a specific method has higher adhesive strength and excellent weather resistance, seepage resistance, durability and other characteristics;
and (IV) the functional filler is used as the main component of the coating material, and can be well combined with the asphalt cement under the action of the activated modified master batch, and the specific mechanism is as follows: double bonds in unsaturated fatty acid in the modified master batch are subjected to cross-linking polymerization in the ultrasonic activation process to form an oligomeric amphiphilic surface active substance, wherein a long-chain part can be well fused with an asphaltene micelle to form a sol-gel structure, and a hydrophilic part can be fused with inorganic salt of a functional filler, so that the existence of the unsaturated fatty acid enhances the tight bonding degree between the functional filler and an asphalt binder, thereby improving the wear resistance, the skid resistance and other auxiliary functions of the coating material;
the lignocellulose is adopted as the stabilizer, and due to the excellent flexibility and dispersibility of the lignocellulose, the lignocellulose can form a three-dimensional net structure after being mixed with the asphalt cement, so that the adhesion between the asphalt cement and the functional filler is further increased, the layered segregation is avoided, and the stability and durability of the coating material are improved;
the addition of the drier plays roles of improving the film forming speed of the asphalt mixed coating material and accelerating the curing when the coating material acts on the damaged asphalt pavement;
and (seventh) when the coating material acts on the damaged asphalt pavement, various components can be uniformly dispersed on the exposed aggregate surface to play an effective protection role: wherein the functional filler and the asphalt binder in the coating material can form high-stiffness asphalt mastic on the surface of the bare aggregate, thereby improving the wear resistance of the pavement; the alkoxy of the silane coupling agent in the coating material can generate carbonyl reaction with the carbonic acid group on the surface of the functional filler, and silanol bonds are mutually associated to form a surface film to be attached to the surface of the bare aggregate, so that the close fusion between the coating material and the bare aggregate is further enhanced;
aromatic hydrocarbon in the regenerant effectively supplements loss of aromatic micromolecule substances in the asphalt aging process by dissolving and dispersing asphaltene in the aged asphalt film of the old pavement under the action of an antioxidant, and the phthalate substances can further improve the rheological property of the aged asphalt and restore the aged asphalt material.
The interaction of all materials in the coating material not only ensures that the coating material has stable storage, uniform spraying, fast solvent volatilization after spraying, good adhesion (adhesion grade 5 grade), excellent wear resistance (service life 6-10 years), but also can ensure the specific proper fluidity (20 ℃ Brookfield viscosity is 2000-4000cPs), can realize spraying operation, reduce construction difficulty and improve working efficiency.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the following specific embodiments, but the invention is not limited by the following embodiments, namely, the embodiments are part of the embodiments of the invention, but not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: and (3) preparing a modified master batch.
TABLE 2 modified masterbatch Material ratios and parameter control
Description of materials:
oleic acid: molecular weight of 282.46, melting point of 13-14 ℃;
palmitoleic acid: molecular weight 254.41, melting point 0.5 ℃;
soybean oleic acid: 280-284 of molecular weight and 15 ℃ of melting point.
[ PREPARATION METHOD ]
Adding the main solvent II and the anti-permeability agent in the formula amount into a small-sized reaction kettle, stirring for 20min at 50 ℃ to completely dissolve the main solvent II and the anti-permeability agent, then sequentially adding the regenerant, the silane coupling agent, the modifier and the antioxidant, keeping the temperature, continuously stirring for 40min, naturally cooling to room temperature, and then carrying out ultrasonic treatment for a certain time to obtain activated modified master batches which are respectively marked as master batch 1, master batch 2, master batch 3, master batch 4, master batch 5, master batch 6, master batch 7 and master batch 8. The whole test process is carried out in a closed reaction container, and nitrogen is filled for deoxygenation before the test.
Example two: and preparing the old asphalt pavement coating material.
TABLE 3 coating materials ratio
Description of materials:
qingchuan rock asphalt: penetration 3(0.1mm) at 25 ℃ and softening point 220 ℃;
50# asphalt: penetration 45(0.1mm) at 25 deg.C, softening point 67 deg.C;
pitch # 40: penetration 38(0.1mm) at 25 deg.C, softening point 70 deg.C;
30# asphalt: penetration 28(0.1mm) at 25 ℃ and softening point 72 ℃.
[ PREPARATION METHOD ]
A1, heating the asphalt cement to 135 ℃, and then cooling to a state of maintaining a flowing and transportable state to obtain a component A;
A2. mixing the first main solvent and the modified master batch at the temperature of 50 ℃, and uniformly stirring to obtain a component B;
A3. and slowly adding the component A into a main stirrer of the component B, mixing, sequentially adding the stabilizer, the drier and the functional filler, and uniformly stirring to obtain the final long-acting hydrophobic water coating material, which is marked as example one, example two, example three, example four, example five, example six, example seven and example eight.
The steps A1-A3 are all carried out in a closed container under the protection of nitrogen.
[ Property measurement ]
The coating materials obtained by the preparation methods are filled into a container tank of spraying equipment, and after being uniformly stirred, a pavement spraying test is carried out, wherein the spraying amount is 1Kg/m2。
The control parameters are as follows:
a work vehicle: Halik-CH-32000I professional high-pressure spray truck;
spraying flow rate: 347 Kg/min;
spraying pressure: 20 Kg;
the speed per hour of the operation: 8 Km/h;
height above ground of the sprinkling pipe: 400 mm;
adjacent oil nozzle spacing: 300 mm.
[ test results ]
TABLE 4 test results
The detection data in table 4 show that the various properties of the materials in all the above embodiments meet the construction quality requirements, and can reach the performance level of the new asphalt pavement material, and even be superior to some new asphalt pavement materials in the aspects of water permeability, bonding strength, wear resistance and other properties, and can greatly improve the regeneration, water sealing and loosening resistance of the old asphalt pavement, and has the advantages of simple and convenient implementation process, stable performance, short drying time and the like. The results show that the old asphalt pavement coating material can regenerate and recover the performance of the aged asphalt pavement, thereby meeting the requirements of traffic safety and quality of the pavement.
Claims (9)
1. The old asphalt pavement coating material is characterized by being mainly prepared from the following raw materials in parts by weight:
the first main solvent is an organic solvent;
the asphalt cement is low-grade and high-softening-point asphalt;
the modified master batch is prepared from a second main solvent, a modifier, a regenerant, an anti-permeability agent, a coupling agent and an antioxidant;
the coating material has a Brookfield viscosity of 2000-4000cPs at 20 ℃.
2. The old asphalt pavement coating material according to claim 1, characterized in that:
the weight ratio of the second main solvent, the modifier, the regenerant, the anti-permeability agent, the coupling agent and the antioxidant in the functional master batch is (40-55): (10-17): (5.2-6.6): (15-19): (4-11): (0.05-0.15);
the second main solvent is one or a mixture of more of 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil and gasoline;
the modifier is one or a mixture of more of styrene-butadiene copolymer, styrene-butadiene-styrene triblock copolymer and neoprene latex;
the regenerant is a mixture of aromatic hydrocarbon oil and phthalic acid ester, and the mass ratio of the aromatic hydrocarbon oil to the phthalic acid ester is 100 (8-12);
the anti-permeability agent is an unsaturated fatty acid substance, has a melting point of less than or equal to 20 ℃ and a number average molecular weight of less than or equal to 400, and is a mixture of one or more of oleic acid, palmitoleic acid and soybean oleic acid;
the coupling agent is vinyl silane coupling agent;
the antioxidant is fly ash and/or phyllosilicate.
3. The old asphalt pavement coating material as claimed in claim 2, wherein the preparation method of the modified master batch comprises the following steps:
and under the protection of nitrogen in a closed container, stirring the main solvent II and the anti-permeability agent at the temperature of 30-60 ℃ until the main solvent II and the anti-permeability agent are completely dissolved, then sequentially adding the regenerant, the coupling agent, the modifier and the antioxidant, continuously stirring for a certain time, naturally cooling to room temperature, and then carrying out ultrasonic treatment for a certain time to obtain the activated modified master batch.
4. The old asphalt pavement coating material according to claim 3, characterized in that: the ultrasonic treatment time is 10-30min, and the vibration frequency is 30-40 KHz.
5. The old asphalt pavement coating material according to claim 1, characterized in that: the first main solvent is one or a mixture of more of 120# solvent oil, 140# solvent oil, 200# solvent oil, light diesel oil and gasoline.
6. The old asphalt pavement coating material according to claim 1, characterized in that: the asphalt cement has a penetration degree of less than or equal to 50(0.1mm) at 25 ℃, a softening point of more than or equal to 65 ℃, and is a mixture of one or more substances of rock asphalt, Trinidad lake asphalt, 50# asphalt, 40# asphalt, 30# asphalt, 20# asphalt and 10# asphalt.
7. The old asphalt pavement coating material according to claim 1, characterized in that: the functional filler is powder ground by basic rock or super basic rock, has the fineness of not less than 200 meshes, and comprises one or a mixture of more of ground marble, limestone, basalt, granite, dolomite, talcum powder, carborundum or steel slag powder.
8. The old asphalt pavement coating material according to claim 1, characterized in that: the stabilizer is lignocellulose;
the drier is one or a mixture of two of naphthenic acid soap and sulfite.
9. The preparation method of the old asphalt pavement coating material is characterized by comprising the following steps: the preparation process of the coating material is carried out in a closed container under the protection of nitrogen, and comprises the following steps:
s1, stirring a main solvent II and an anti-permeability agent at 30-60 ℃ until the main solvent II and the anti-permeability agent are completely dissolved, then sequentially adding a regenerant, a coupling agent, a modifier and an antioxidant, continuously stirring for a certain time, naturally cooling to room temperature, and then carrying out ultrasonic treatment for a certain time to obtain an activated modified master batch;
s2, heating the asphalt cement to the temperature of 120-150 ℃, and then cooling to a state of maintaining a flowing and transportable state to obtain a component A;
s3, mixing the primary solvent I and the modified master batch at the temperature of 30-60 ℃, and uniformly stirring to obtain a component B;
s4, slowly adding the component A into the component B, then sequentially adding the stabilizer, the drier and the functional filler, uniformly stirring to obtain the long-acting hydrophobic coating material,
the weight ratio of each raw material is as follows:
the first main solvent is an organic solvent;
the asphalt cement is low-grade and high-softening-point asphalt;
the modified master batch is prepared from a second main solvent, a modifier, a regenerant, an anti-permeability agent, a coupling agent and an antioxidant;
the coating material has a Brookfield viscosity of 2000-4000cPs at 20 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113637376A (en) * | 2021-09-14 | 2021-11-12 | 海南红杉科创实业有限公司 | Building waterproof coating and preparation method thereof |
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